<?php
$m = new MongoClient;
$m->demo->articles->drop();

foreach ( glob( '201*rst' ) as $file )
{
    $c = file_get_contents( $file );
    $c = str_replace('\\n', "\n", $c);
    preg_match( '/^.*/', $c, $match );

    $m->demo->articles->insert( [
        '_id' => $file,
        'subject' => $match[ 0 ],
        'text' => $c,
        'simple_index' => preg_split( '/[ \n]/', $c ),
    ] );
}